Spinning machine



"Jan. 19, 1943. A. DE N-ms Y SPINNING MACHINE Filed Sept. 15, 1940 a 4 Sheets-Sheet l 5 I igQI;

H hIveniur Auguai'n Defienciia 59 4MM aIgW/ZMX.

Jan. 19, 1943.

A.,DE REN rns- SPINNING MACHIBE 1 Filed Sept. 15, 1940 4 Sheets-Sheet s n5 w w AH m ny.

Jan. 19, 1943. DE RENTIIS 3,

SPINNING MACHINE 7 Filed Sept. 15, 1940 4 Sheets-Sheet 4 46% A harm-2 v Q i lmierftfir Auguahj HERE III/'11 11/11/111 r. A I

Patented Jan. 19, 1943 UNITED STATES FATE FF ECE (Granted under the act of March 3, 1883, as

amended April 30, 1928; 370 0. G. 757) The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.

This invention is concerned with a method and means of manufacturing parts for fuse clockworks. In particular, it deals with a method and means for joining together parts such as gears to pinions, and escapement levers to arbors which parts are intended to operate as a unit in the clockwork. According to the present invention this joining is accomplished by the spinning method. While the spinning method is:not new, per se, it has never been used forthe purpose of joining the parts in clockwork mechanisms.

Briefly the method consists in clamping down, against a yielding force, one of the parts to be joined, while a spinning tool is presented to the other part and forces the metal thereof out and over the first part to lock the parts together.

It is, therefore, an object of this invention to integrate parts of a clockwork by the spinning method.

This and other objects will appear fromthe following detailed description of a preferred embodiment of the invention and from the accompanying drawings in which:

Fig. 1 is a side elevation, partly in section, of a spinning machine for an escapement lever;

Fig. 2 is a plan view of the chuck of the machine shown in Fig. 1;

Fig. 3 is a section taken on the line '33 of Fig. '2;

Fig. 4 is a section taken on the line 4-4 of Fig. 2;

Fig. 5 is a section taken along the.line 5-5 of Fig. 2;

Fig 6 is an enlarged detail of the spinning tool engaging an escapement lever and its arbor in the process of spinning the same;

Fig. 7 is an elevational view in section of a chuck shown holding a pinion for spinning;

Fig. 8 is a section on the line 8-8 of Fig. '7;

Fig. 9 is a fragmentary view of the chuck of Fig. 7 showing the gear and pinion. and the spinning tool;

Fig. 10 is a top plan view of the chuck of Figs. '7 and 9;

Fig. 11 is a section of the lower part of the ceive screw 8, the purpose of which isto adjust the position of tool I in bore 6. Set screw 9 holds tool I in the bore and also prevents it from rotating.

An outer housing Ill held in surrounding engagement with the spinning shaft and flange II thereof by flanged nut I2 against the action of spring I3 is freely slidable on said shaft together with the bearing races I4 and I5.

The lower tip of the spinning tool 'I is located above the bottom of bushing It in housing II] when nut I2 is in contact with flange I I. Thus, bushing I6 is the first part of the spinning unit to touch the Work. The bushing holds the part to which the spun union is to be made. For in stance, it holds down the escapement lever I! while the arbor I8 is spun thereto as shown in Fig. 6. The strength of spring I3 determines the force with which the work is held.

The chuck of Fig. 1 is shown more clearly in Figs. 2 to 5. This chuck is designed to hold the escapement lever and its arbor. Lever I9 is for gripping the work, that is, the arbor, while lever 20 is for removing the work after the spinning operation. Lever I9 is attached to a cylinder 2! rotating about an eccentric vertical axis. Bolt 22 of the cylinder fits rotatably in sleeve 23 which in turn is fitted into the bottom plate 24 of the chuck. Bolt 22 is held in the chuck by the end 25 of set screw 26 engaging groove 27 of the bolt. Cylinder 2| slides table 28 into engagement with the lower part of arbor I8, shown as rectangular in cross section, against the action of spring 29. The spring will return the table when the cylinder 2| is rotated in the reverse sense.

The fixed parts of the vice arrangement comprises two thick plates 65, 66 having a thin plate chuck taken at right angles to the section of the spinning'tool 'I. Bore 6 is threaded to re- 67 held between them by dowels 63. Plates 65, 66 are held by screws 69 and are fitted between standards Ill, 'II which are part of the bottom plate 24. Thin plate 6'! is shorter than plates 65. 66 leaving a slot for reception of the fiat-faced arbor I3. The provision of thin plate 6! permits ready interchange of vices for different sized work and provides a clamp wherein the piece requiring hardening is relatively small.

Slot 30 in plate BI is for the purpose of locating the escapement lever I I in the correct angular position on the chuck and to hold it from rotation during the spinning.

Lever 20 operating in slot 32 is pivoted to the chuck by pin 33 and engages bolt 34 in slot 35. Bolt 34 has fixed within it a small rod insert 36 for ejecting engagement with the escapement arbor I8. Th s small rod 3'6 has a bore in its end for clearing the pivot point of the arbor. Lever 28 is lim ted in its upward motion by extension 31- contacting the bottom of slot 32. Rod 36 is kept in its lowered position for receiving the arbor by means of spring 38 acting on flange 39 on bolt 34.

In the case of spinning gears and pinions together, the chuck of Fig. 7 is used. 40 is a split collet for holding the pinion 4|. The end face of the pinion must be flush with the end face of the collet.

42 over the face of the collet. Stop bar 42 has a This is accomplished by moving stop bar rack 43 operated by a pinion 44 on the shaft of hand knob 45.

The pinion 4| is brought up against the stop 2 bar 42 and tightened by action of the inclined upper surface of bar 46. This bar reciprocates in a slot 4! in upper base member 48 (Fig. 11).

This upper base member together with inner cup collet jaws will not materially increase the pressure of the pinion face against the stop bar.

The turning of hand lever 54 tightens the collet jaws by acting through key 56, which turns sleeve 5']. The latter has lugs 58 which turn nut 59. This nut is threaded to the adapter 60 and since the latter is held with the base of the chuck against rotation through keys 6| and 62 and bolts 63, the turning of nut 59 will slide adapter 60 down along key 6| and tighten the collet jaws through inclined surfaces 64 of the adapter 65.

The clearance between these surfaces and the I collet jaws at the commencement of operations will be such that the tightening action will not take place until the pinion 4| has been raised into position against stop 42.

I claim:

1. A work holder comprising a collet, a guiding rod slidable axially therethrough, a lifting bar movable transverse to said rod and having an inclined surface engaging the bottom thereof,

said bar engaging said chuck so as to be nonrotatable with respect thereto, and means for sliding said bar comprising an element rotatable concentrically with said rod and having an eccentric opening engaging the extremities of said rod.

2. In a work holder as in claim 1 a driving eleit I ment for turning said rotatable element and a spring forming a connection between said elements for resiliently transmitting the drive.

3. A work holder comprising a collet, a guiding cam means, a resilient force transmitting connection between said driving means and said cam means, means for tightening said collet and keying means between said driving means and said tightening means.

6. A work holder comprising a collet, tightening means for said collet, a work-adjusting member contained centrally of said collet and movable axially thereof, means for moving said workadjusting means, and a resilient force transmitting connection between said tightening means and said moving means.

7. A work holder comprising an outer housing, a sleeve rotatably mounted in said outer housing, an inner housing fixed to the base of said outer housing and extending within said sleeve, a transverse slot in said inner housing, an eccentric inner periphery on said sleeve on a line with said slot, a bar in said slot having a sloping upper surface engaging by its ends said eccentric periphery, to be moved transversely thereby when said sleeve is rotated, a collet carried by said inner housing, an axial passage in said collet, spring means in said passage and a rod in said passage movable axially thereof against said spring means and supported on the upper surface of said bar to be reciprocated by engagement with the slope thereof when said bar is moved transversely, a tapered edge on said collet, a tightening sleeve around said collet having an edge tapered complementary to the tapered edge of said collet for constricting the collet by longitudinal motion of the tightening sleeve, external threads on said tightening sleeve, an adjusting sleeve having internal threads engaging the external threads on said tightening sleeve, keying means between said tightening sleeve and said collet to hold said tightening sleeve against rotation, means for manually rotating said adjusting sleeve, a spring connection between said adjusting sleeve and the first-mentioned sleeve to permit a continued motion of said adjusting sleeve after stoppage of said first-mentioned sleeve, and stop means for said 1 rod carried by said housing and slidable across the face of said collet.

8. A work holder comprising a bed plate, two spaced parallel uprights on the upper face thereof, a vice jaw fitted between said uprights and detachably fixed to said bed plate and comprising two parallel bars with a central plate therebetween, dowelled thereto for ready replacement, said central plate being of a length less than the parallel bars so as to leave a slot for reception of rod slidable axially therethrough, a lifting bar 1 movable transverse to said rod and having an inclined surface engaging the bottom thereof, said bar engaging said chuck so as to be non-rotatable with respect thereto, and means for sliding said bar comprising an element rotatable concentrically with said rod and having an eccentric opening engaging the extremities of said rod, said chuck also comprising a driving element for turning said rotatable element and a spiral spring I forming a connection between said elements for a work piece, two further spaced parallel uprights forward of the first-mentioned uprights, undercut on their opposed faces, a sliding vice jaw fitted in said undercut faces and aligned with said central plate, spring means holding said sliding vice jaw normally away from said central plate, a cylinder eccentrically pivoted in said bed plate with' its elements contacting the outer edge of said sliding jaw, a handle on said cylinder for turning the same about its pivot, an opening in said bed plate beneath the meeting point of said vice jaw, a plunger in said opening, spring means holding said plunger normally downward away from a work piece in the vice jaws, a slot in said plunger, a lever pivoted to said bed plate and having one extremity engaging the slot in said plunger, and a member detachably secured to one of said first-mentioned uprights, said member having a slot for receiving an extending portion of a work piece to give the same added support against torsional stresses in a spinning operation.

AUGUSTO DE RENTIIS. 

